Well, being self-taught is a noticeable skill on its own already. I also know the feeling of becoming super invested in something when I pick up a new hobby, but then there are times when I feel really "low energy" and can't bring myself to do the things I'm supposed to enjoy (like tinkering with PCs, mapping or even just playing some games) - often that correlates with stress at work, lack of sleep and low social contacts. However once I do pick up something again, usually for me I find that I do have the energy to pursue it and it's just the starting motivation that's missing.
Maybe what you say is a sign of simply reaching some "dead end" in the intrinsic motivation for one topic and it'd make sense to look for new ventures. Could there be something that combines/enhances your previous projects with a totally different/new skill set? Like hooking a micro controller up to some christmas decorations to produce some unique effects, while getting a more cozy surroundings at the same time? Or looking into some music theory and experimenting with that?
Wake up cowle!